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annotate toys/sed.c @ 231:31dc682c18ad

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Very early stub of sed, does nothing yet.
author Rob Landley <rob@landley.net>
date Thu, 10 Jan 2008 14:34:15 -0600
parents
children d4176f3f3835
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231
31dc682c18ad Very early stub of sed, does nothing yet.
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1 /* vi: set sw=4 ts=4: */
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2 /*
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3 * sed.c - Stream editor.
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4 *
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5 * See http://www.opengroup.org/onlinepubs/009695399/utilities/sed.c
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6 */
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7
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8 #include "toys.h"
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9 #include "lib/xregcomp.h"
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10
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11 #define TT toy.sed
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12
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13 struct sed_command {
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14 // Doubly linked list of commands.
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15 struct sed_command *next, *prev;
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16
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17 // Regexes for s/match/data/ and /match_begin/,/match_end/command
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18 regex_t *match, *match_begin, *match_end;
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19
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20 // For numeric ranges ala 10,20command
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21 int first_line, last_line;
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22
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23 // Which match to replace, 0 for all.
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24 int which;
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25
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26 // s and w commands can write to a file. Slight optimization: we use 0
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27 // instead of -1 to mean no file here, because even when there's no stdin
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28 // our input file would take fd 0.
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29 int outfd;
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30
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31 // Data string for (saicytb)
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32 char *data;
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33
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34 // Which command letter is this?
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35 char command;
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36 };
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37
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38 void sed_main(void)
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39 {
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40 struct arg_list *test;
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41
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42 for (test = TT.commands; test; test = test->next)
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43 dprintf(2,"command=%s\n",test->arg);
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44
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45 printf("Hello world\n");
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46 }